What is the per-port data rate of the MMA4Z00-NS twin-port OSFP?

Each of the two MPO-12/APC ports carries 400 Gb/s (8 × 100G PAM4), for an aggregate of 800 Gb/s per OSFP cage.

Can the MMA4Z00-NS be used over single-mode fiber for longer reach?

No. The MMA4Z00-NS is an SR8 multimode VCSEL module at 850 nm, rated for up to roughly 50 m on OM4 fiber. For single-mode reach use a DR8 / DR4-class single-mode 400/800G part.

How does T.E.S IT-SOLUTIONS verify refurbished NDR-class transceivers?

T.E.S IT-SOLUTIONS measures per-lane optical power and reads DDM telemetry on every unit before shipment. See https://www.tes-itsolutions.com for fabric-level pre-sales support.

NVIDIA Mellanox MMA4Z00-NS 800 Gb/s Twin-Port OSFP SR8 Multimode Transceiver: This is a twin-port OSFP optical transceiver delivering 2 × 400 Gb/s (800 Gb/s aggregate) over multimode fiber, using SR8 (8-lane, short-reach) optics. The module is designed for NVIDIA NDR InfiniBand and 400/800 Gigabit Ethernet switches and adapters; it is not a single-port 800G part and not a single-mode DR/FR/LR transceiver. This is a refurbished unit.

Engineering Context

The MMA4Z00-NS uses 8 transmit and 8 receive VCSEL lanes operating at 100 Gb/s PAM4 per lane in the 850 nm window. The OSFP twin-port form factor exposes two MPO-12/APC interfaces, each carrying one 400G NDR / 400GbE port, allowing a single switch cage to feed two 400G end devices via a breakout cable. The module is designed for NDR (and downshifted HDR) InfiniBand fabrics and 400/800 Gigabit Ethernet, with a typical reach of up to 50 m on OM4 multimode fiber.

Deployment & Use Cases

NDR InfiniBand fabrics on Quantum-2 (QM9700/QM9790) switches and ConnectX-7 / BlueField-3 adapters, where each twin-port OSFP cage feeds two 400G ports in a leaf-spine fat tree. 400/800 Gigabit Ethernet on Spectrum-4 switches in AI training clusters. GPU node interconnect for HGX/DGX deployments using OM4 trunk cabling. Storage fabrics for high-throughput parallel file systems where multimode reach is sufficient.

Technical Specifications

OEM: NVIDIA Mellanox
Part Number: MMA4Z00-NS
Form Factor: OSFP, Twin-Port (2 × 400G)
Aggregate Data Rate: 800 Gb/s
Per-Port Data Rate: 400 Gb/s (8 × 100G PAM4)
Optical Type: SR8 VCSEL, 850 nm
Fiber Type: Multimode (OM3/OM4)
Connector: 2 × MPO-12/APC
Typical Reach: Up to 50 m on OM4
Protocols: NDR InfiniBand, 400/800 Gigabit Ethernet
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS

Compatibility & Constraints

Designed for NVIDIA Quantum-2 and Spectrum-4 platforms and ConnectX-7 / BlueField-3 OSFP adapters. The module's twin-port architecture means each cage drives two independent 400G ports — a 1:1 OSFP-to-OSFP straight cable will only utilize one of the two ports unless the peer also exposes a twin-port cage. Not interoperable with single-mode optics (DR/FR/LR) or with finned/non-finned-riding-heatsink cages that violate the host thermal class. Use OM4 (or better) multimode fiber with MPO-12 APC connectors; OM3 reduces the supported reach. Verify NVOS / Cumulus / NVIDIA OFED versions support 800G twin-port mode before deployment.

Why TES

T.E.S IT-SOLUTIONS validates per-lane optical power and DDM telemetry on every NDR-class transceiver before shipment. Visit tes-itsolutions.com for fabric-level compatibility consultation, full warranty terms, and 1–3 day handling on in-stock units.

NVIDIA Mellanox® MMA4Z00-NS 800Gb/s OSFP SR8 Twin-Port MMF Transceiver

Name: NVIDIA Mellanox® MMA4Z00-NS 800Gb/s OSFP SR8 Twin-Port MMF Transceiver
SKU: MMA4Z00-NS_Refurbished

SKU: MMA4Z00-NS_Refurbished

€850.00

Quantity